Verb The dog wagged its tail. She wagged her finger at the children as she scolded them. He wagged his head back and forth. The dog's tail began to wag excitedly.
Word History
Etymology
Verb
Middle English waggen; akin to Middle High German wacken to totter, Old English wegan to move — more at way
Noun (2)
probably short for obsolete English waghalter gallows bird, from English wag entry 1 + halter